171、for a type of parking meter(计费表), a quarter is charged for 1/4 hr, 一个衰人puts 3 quarters, but the meter misreads for two. how many cents did the poor guy actually pay for each minute?
【机委】2.5
R：75cents/30minytes=2.5
请教:如果"TWO"指 TWO QUARTER, 那么此人实际付了50 CENT,而非75 CENT;所以我觉得可能是自己对题目没理解清楚,可否解释一下"a quarter is charged for 1/4 hr",我对(quarter和1/4 hr)的时间与花费的关系不清楚.作者: tongxun 时间: 2002-10-5 00:59
机警描述失误导致的。得出答案基于以下的理解：
a quarter is charged for 1/4 hr 应该是15分钟收25美分。
此人给了3个15分钟的钱，却只能停2个15分钟的车。
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